scholarly journals POSITIONAL ACCURACY OF AEROPHOTOGRAMMETRIC SURVEY IN THE PANTANAL DERIVED FROM UAV

2018 ◽  
Vol 37 (1) ◽  
pp. 137-146
Author(s):  
Anny Keli Aparecida Alves CÂNDIDO ◽  
Antonio Conceição PARANHOS FILHO ◽  
José MARCATO JÚNIOR ◽  
Normandes Matos da SILVA ◽  
Marcelo Ricardo HAUPENTHAL ◽  
...  
Keyword(s):  
Electric Propulsion ◽  
Control Point ◽  
Aerial Photographs ◽  
Control Points ◽  
Positional Accuracy ◽  
Mato Grosso ◽  
Gps Navigation ◽  
Remotely Piloted Aircraft ◽  
Aerial Vehicle ◽  
Mato Grosso Do Sul

The objective of this work was to analyze the geometric distortions of aerial photographs mosaic derived from unmanned aerial vehicle (UAV) generated with data from a GPS navigation engaged in remotely piloted aircraft in relation to the field collected control points with an RTK . The imaging was performed on August 9, 2014, at UFMS research base in the Pantanal of Mato Grosso do Sul, with a fixed-wing aircraft and electric propulsion motor. The flight was conducted at an altitude of 150 m, planned in such a way to obtain pixels with about 4 cm spatial resolution. To check the accuracy of the mosaic were collected control points from a GNSS HIPER receiver. To ease the location of points on aerial photographs were made markings on the ground. Mosaic without control point presented displacement ranging from 6.30 m to 8,83m. Previously the tiles with 1, 2 and 3 control points had low errors, given the legislation for the georeferencing of rural properties. Products generated from controls points have high planialtimetric accuracy and are likely to use in jobs that require high positional accuracy, such as expertise services, registration and georeferencing of rural properties, crops analysis and flora and fauna quantification.

The Unevenness of the Footing And Its Impact on the Results of Photogrammetric Transformation

2017 ◽  
Vol 921 (3) ◽  
pp. 43-47
Author(s):  
Yu.I. Golovanev
Keyword(s):  
Significant Influence ◽  
Control Point ◽  
Aerial Photographs ◽  
Topographic Maps ◽  
Ground Control ◽  
Control Network ◽  
Control Points ◽  
Topographic Map ◽  
Exterior Orientation ◽  
Field Control

The article deals with the fact, that the state or special geodetic networks points identified on the aerial photographs, control network and aerial photographs field control surveys points including contour points with coordinates taken from the topographic map of larger scale and defined when creating topographic maps can be used for exterior orientation of photogrammetric networks during the implementation of works on topographic maps revision. Besides planimetric points of the map that has been revising can also be used. The ground control point (reference point) coordinates are not of equal accuracy, as their values were got from the sources that have different plane coordinates accuracy. This fact has a significant influence on the point coordinates planimetric position of the route photogrammetric network that is developed. There is some information in the article about the control points unequal accuracy influence on the point planimetric position of the route photogrammetric network. This fact occurs when part of control points was obtained by means of accurate surveying methods but other control points plane coordinates due to their unavailability have to be obtained from the topographic map. The results of the experiment are given as evidence.

scholarly journals Comparison of Accuracy Aerial Photography UAV (Unmanned Aerial Vehicle) and GNSS (Global Navigation Satelitte System) for Mapping of Lambarih Village, Aceh Besar, Aceh

2020 ◽  
Vol 9 (3) ◽  
pp. 78-83
Author(s):  
Marwan A Bakar ◽  
Freddy Sapta Wirandha ◽  
Nizzamuddin Nizzamuddin ◽  
Febrian Fitryanik Susanta
Keyword(s):  
Data Processing ◽  
Control Point ◽  
Observation Point ◽  
Static Method ◽  
Aerial Photographs ◽  
Time Interval ◽  
Initial Stage ◽  
Aerial Vehicle ◽  
Global Navigation ◽  
Gnss Data

UAV (Unmaned Aerial Vehicle) atau yang biasa disebut drone saat ini telah banyak digunakan untuk pemetaan wilayah di Indonesia. Salah satu metode penentuan posisi satelit GNSS (Global Navigation Satelitte System) yaitu dengan metode statik. Penelitian ini mengkaji perbadingan ketelitian foto udara UAV dan foto udara UAV yang telah diikatkan dengan GNSS. Tahapan awal dalam penelitian ini adalah dilakukan pengambilan foto udara UAV wilayah Gampong Lambarih, kemudian dilakukan pengambilan data GNSS di lapangan sebanyak 4 titik di kawasan Gampong Lambarih, Aceh Besar dengan menggunakan titik kontrol atau titik ikat stasiun CBDA dengan doy 040 di Jantho. Tiap titik pengamatan dilakukan selama 30 menit dengan interval waktu pengukuran 1 detik. Pengolahan data UAV menggunakan aplikasi Agisoft dan pengolahan data GNSS menggunakan aplikasi HiTarget Geomatic Office (HGO) dan Website BIG. Hasil penelitian menunjukkan foto udara UAV yang diikat dengan GNSS memiliki ketelitian yang lebih tinggi yaitu mecapai ketelitian orde mm. UAV (Unmaned Aerial Vehicle) or what is commonly called a drone is currently widely used for regional mapping in Indonesia. One method of determining the position of the GNSS (Global Navigation Satelitte System) satellite is the static method. This study examines the comparison of the accuracy of UAV aerial photographs and UAV aerial photographs that have been tied to GNSS. The initial stage in this research was to take aerial photographs of the UAV of the Lambarih Village area. Then the GNSS data collection was carried out in the field as many as 4 points in the Gampong Lambarih area, Aceh Besar using the control point or tie point of the CBDA station with doy 040 in Jantho. Each observation point was carried out for 30 minutes with a measurement time interval of 1 second. UAV data processing uses the Agisoft application and GNSS data processing using the HiTarget Geomatic Office (HGO) application and the BIG Website. The results showed that aerial photographs of UAVs bound with GNSS had a higher accuracy reaching in order of mm. Keywords: GNSS, UAV, Statik, BIG, HGO

scholarly journals ARE MEASURED GROUND CONTROL POINTS STILL REQUIRED IN UAV BASED LARGE SCALE MAPPING? ASSESSING THE POSITIONAL ACCURACY OF AN RTK MULTI-ROTOR PLATFORM

2020 ◽  
Vol XLIII-B1-2020 ◽  
pp. 507-514 ◽  
Author(s):  
L. Teppati Losè ◽  
F. Chiabrando ◽  
F. Giulio Tonolo
Keyword(s):  
Large Scale ◽  
Control Point ◽  
Satellite System ◽  
Added Value ◽  
Ground Control ◽  
Positional Accuracy ◽  
Ground Control Points ◽  
Aerial Vehicle ◽  
Global Navigation Satellite ◽  
The Impact

Abstract. The estimate of External Orientation (E.O.) parameters for a block of images is a crucial step in the photogrammetric pipeline and the most demanding in terms of required time and human effort, both during the fieldwork and post-processing phases. Different researchers developed strategies to minimize the impact of this phase. Despite the achievement of good results, it was not possible until now to completely cancel the effect of this step. However, the efforts of the researchers in these years have also been devoted to the implementation of direct photogrammetry strategies, in order to almost completely automate the E.O. of the photogrammetric block. These new approaches were made possible also thanks to the latest developments of commercial UAVs, especially in terms of the installed GPS/GNSS (Global Positioning System/Global Navigation Satellite System) hardware. The aim of this manuscript is to evaluate the different perspectives and issues connected with the deployment of a UAV (Unmanned Aerial Vehicle) equipped with a multi-frequency GPS/GNSS receiver. Starting from the considerations mentioned above and leveraging previous works based on a fixed-wing platform, the focus of this contribution is the assessment of the real performances of an RTK multi-rotor platform addressing several questions. Is it possible to generate added-value products with centimetre 3D accuracies without measuring any ground control point? Which are the operational requirements to be taken into account in the planning phase? Are consolidated UAV mapping operational workflows already available to enable a robust direct georeferencing approach?

scholarly journals Epidemiological risk in the movement of cattle in the regions of critical control points for foot-and-mouth disease in the state of Mato Grosso do Sul

2021 ◽  
Vol 8 (12) ◽  
pp. 053-070
Author(s):  
Marco Aurélio Guimarães ◽  
Marcos Camargo ◽  
Marcelo Sebastião Marcondes de Sousa ◽  
Kamylla Lucas Silveira ◽  
Fabio Sousa Nantes ◽  
...  
Keyword(s):  
Foot And Mouth Disease ◽  
The State ◽  
Mouth Disease ◽  
Control Points ◽  
Mato Grosso ◽  
Critical Control Points ◽  
Foot And Mouth ◽  
Epidemiological Risk ◽  
Mato Grosso Do Sul

scholarly journals PRODUCT ACCURACY EFFECT OF OBLIQUE AND VERTICAL NON-METRIC DIGITAL CAMERA UTILIZATION IN UAV-PHOTOGRAMMETRY TO DETERMINE FAULT PLANE

2016 ◽  
Vol III-6 ◽  
pp. 41-48 ◽  
Author(s):  
C. Amrullah ◽  
D. Suwardhi ◽  
I. Meilano
Keyword(s):  
Fault Plane ◽  
Control Point ◽  
Digital Camera ◽  
Aerial Photographs ◽  
Ground Control ◽  
Control Points ◽  
Point Configuration ◽  
Ground Control Points ◽  
Significant Difference ◽  
Precision And Accuracy

This study aims to see the effect of non-metric oblique and vertical camera combination along with the configuration of the ground control points to improve the precision and accuracy in UAV-Photogrammetry project. The field observation method is used for data acquisition with aerial photographs and ground control points. All data are processed by digital photogrammetric process with some scenarios in camera combination and ground control point configuration. The model indicates that the value of precision and accuracy increases with the combination of oblique and vertical camera at all control point configuration. The best products of the UAV-Photogrammetry model are produced in the form of Digital Elevation Model (DEM) compared to the LiDAR DEM. Furthermore, DEM from UAV-Photogrammetry and LiDAR are used to define the fault plane by using cross-section on the model and interpretation to determine the point at the extreme height of terrain changes. The result of the defined fault planes indicate that two models do not show any significant difference.

scholarly journals DEM Generation from Fixed-Wing UAV Imaging and LiDAR-Derived Ground Control Points for Flood Estimations

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3205 ◽  
Author(s):  
Jairo R. Escobar Villanueva ◽  
Luis Iglesias Martínez ◽  
Jhonny I. Pérez Montiel
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Structure From Motion ◽  
Local Level ◽  
Control Point ◽  
Ground Control ◽  
Control Points ◽  
Ground Control Points ◽  
Digital Elevation ◽  
Elevation Data ◽  
Aerial Vehicle

Geospatial products, such as digital elevation models (DEMs), are important topographic tools for tackling local flood studies. This study investigates the contribution of LiDAR elevation data in DEM generation based on fixed-wing unmanned aerial vehicle (UAV) imaging for flood applications. More specifically, it assesses the accuracy of UAV-derived DEMs using the proposed LiDAR-derived control point (LCP) method in a Structure-from-Motion photogrammetry processing. Also, the flood estimates (volume and area) of the UAV terrain products are compared with a LiDAR-based reference. The applied LCP-georeferencing method achieves an accuracy comparable with other studies. In addition, it has the advantage of using semi-automatic terrain data classification and is readily applicable in flood studies. Lastly, it proves the complementarity between LiDAR and UAV photogrammetry at the local level.

scholarly journals PRODUCT ACCURACY EFFECT OF OBLIQUE AND VERTICAL NON-METRIC DIGITAL CAMERA UTILIZATION IN UAV-PHOTOGRAMMETRY TO DETERMINE FAULT PLANE

2016 ◽  
Vol III-6 ◽  
pp. 41-48 ◽  
Author(s):  
C. Amrullah ◽  
D. Suwardhi ◽  
I. Meilano
Keyword(s):  
Fault Plane ◽  
Control Point ◽  
Digital Camera ◽  
Aerial Photographs ◽  
Ground Control ◽  
Control Points ◽  
Point Configuration ◽  
Ground Control Points ◽  
Significant Difference ◽  
Precision And Accuracy

This study aims to see the effect of non-metric oblique and vertical camera combination along with the configuration of the ground control points to improve the precision and accuracy in UAV-Photogrammetry project. The field observation method is used for data acquisition with aerial photographs and ground control points. All data are processed by digital photogrammetric process with some scenarios in camera combination and ground control point configuration. The model indicates that the value of precision and accuracy increases with the combination of oblique and vertical camera at all control point configuration. The best products of the UAV-Photogrammetry model are produced in the form of Digital Elevation Model (DEM) compared to the LiDAR DEM. Furthermore, DEM from UAV-Photogrammetry and LiDAR are used to define the fault plane by using cross-section on the model and interpretation to determine the point at the extreme height of terrain changes. The result of the defined fault planes indicate that two models do not show any significant difference.

A Synopsis of Dicliptera (Acanthaceae) in Brazil, with the Description of Two New Species

2020 ◽  
Vol 45 (2) ◽  
pp. 340-348
Author(s):  
James Lucas da Costa-Lima ◽  
Earl Celestino de Oliveira Chagas
Keyword(s):  
New Species ◽  
South America ◽  
The State ◽  
Northeastern Brazil ◽  
Mato Grosso ◽  
The North ◽  
New Synonyms ◽  
Two New Species ◽  
Mato Grosso Do Sul ◽  
A New Species

Abstract—A synopsis of Dicliptera (Acanthaceae) for Brazil is presented. Six species are recognized: Dicliptera ciliaris, D. sexangularis, and D. squarrosa, widely distributed in South America; D. purpurascens, which ranges from the North Region of Brazil (in the state of Acre) to eastern Bolivia; D. gracilirama, a new species from the Atlantic Forest of northeastern Brazil; and D. granchaquenha, a new species recorded in dry and semideciduous forests in Bolivia and western Brazil, in the state of Mato Grosso do Sul. Furthermore, we propose new synonyms and designate lectotypes for eleven names. An identification key to the six accepted Dicliptera species in Brazil is provided.

LUGARES E NÃO LUGARES DO ESTÁGIO SUPERVISIONADO EM UNIVERSIDADES PÚBLICAS DE MATO GROSSO DO SUL: UEMS e UFGD Coleção Licenciaturas - Volume 1

2020 ◽  
Author(s):  
F. PERBONI ◽  
Carla Regina de Souza FIGUEIREDO ◽  
A. MARQUES ◽  
A. N. MILITÃO ◽  
C. N. JESUS ◽  
...  
Keyword(s):  
Mato Grosso ◽  
Mato Grosso Do Sul
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